JP2576993Y2 - Air cleaner - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner capable of effectively suppressing vibration generated in a cap of an air cleaner due to a change in intake pressure and reducing intake noise.

[0002]

2. Description of the Related Art In recent years, automobiles have been required to reduce the fuel consumption rate from the viewpoint of resource saving and prevention of environmental pollution. Accordingly, as the weight of the entire vehicle has been reduced, lighter materials have been used as materials for the case and cap of the air cleaner from metal to resin.

As shown in FIG. 2 , a case 2 and a cap 3 of an air cleaner 1 made of metal, for example, steel, are provided with a gasket 4 to accommodate a filter element 5 from an opening 2a of the case 2. Then, the cap nut 3 is fixed to the case 2 by screwing the butterfly nut 7 to the center bolt 6.
Since a is firmly fixed, the entire cap 3 does not easily vibrate.

[0004] On the other hand, resin-made products are less rigid than metal-made products and are not suitable for screwing.
Generally, as shown in FIG. 3 , a cap 3 is often used which is hooked and fixed to a peripheral portion of a cap 3 by attaching a hook 8 attached to the case 2. Air cleaner 1 having such a structure
In the above, since the central portion 3a of the cap 3 is not fixed, the cap 3
Are likely to vibrate, which causes an increase in intake noise.

Therefore, the cap 3 of the air cleaner 1 is reinforced by forming ribs 9 or beads 10 as shown in FIGS. 4 (a) and 4 (b) and FIGS. 5 (a) and 5 (b) . Things have been used in the past. Such ribs 9 and beads 10 are generally arranged in an even number as shown in FIG.
Usually, the cap 3 is formed symmetrically with respect to the center.

[0006]

However, the present inventor has not yet been able to sufficiently suppress vibration even in the air cleaner 1 using the reinforced cap 3 formed with the ribs 9 and the beads 10 as described above. Then, it was found that the intake noise was generated due to the variation of the intake pressure, and the vibration mode generated in the cap 3 was analyzed. As a result, the following was confirmed.

That is, when the intake pressure fluctuates, the vibration mode is changed to the rib 9 passing through the center of the cap 3 of the air cleaner 1.
Or generated in the diameter direction of the cap 3 along the bead 10, cap 3 as shown in FIG. 4 (c) (d) in the line A-A of FIGS. 4 (a) is curved, the amplitude at its central portion 3a Vibrations that protrude outside and retract inside the case 2 are generated so that
As shown in FIGS. 5 (c) and 5 (d), the cap 3 passes through the center of the rib 9 or the bead 1 along the line BB in FIG.
It was found that a vibration that bends on both sides from 0 is generated.

[0008] This is because the vibration mode generated in the cap 3 is symmetrical with respect to the center of the cap 3 from one point on the peripheral edge of the cap 3 along the rib 9 or the bead 10. This is thought to be due to the transmission in the diameter direction of the cap 3 toward another point on the peripheral edge.
In this way, the ribs 9 and the beads 10 are formed on the cap 3 in an even number as in the conventional air cleaner 1 so that the angles formed by the ribs 9 and the beads 10 are equally divided and arranged symmetrically with respect to the center of the cap 3. In such a case, there was a problem that the effect of suppressing the vibration was not so great.

In view of the above problems, the present invention interrupts the vibration mode that is likely to be generated in the cap of the air cleaner case by changing the intake pressure by devising the arrangement of the ribs or beads. It is an object of the present invention to provide an air cleaner that can suppress the vibration of the cap and reduce the intake noise.

[0010]

According to the present invention, there is provided an air cleaner, wherein a filter element is accommodated in a case having an opening formed therein, and a cap for closing the opening is provided. Radially around a point offset from the center of the cap
The ribs or beads are continuously extended.

Further , the rib or bead is provided on the cap.
When radially arranged around a point offset from the center
Both are formed so that the angle between them is an unequal angle
Or even number of the ribs or beads radially
Alternatively, there is a method of forming an odd number. In addition, the above-mentioned center part does not indicate the exact center, but means near the center.

[0012]

[Operation] The air cleaner of the present invention has the above-described configuration, and the vibration mode that is generated in the cap due to the fluctuation of the intake pressure is transmitted in the diameter direction of the cap from the periphery to the center of the cap. However, the rib or bead should be centered, especially at a point offset from it.
And are continuously extended radially. In other words,
Release the rib or bead from a position offset from the center of the cap.
Because it is formed to extend radially, the plane of the cap
Strength changes by the offset
Therefore, the transmitted vibration mode is interrupted in the vicinity of the center portion, and acts to prevent the cap from generating a vibration that generates an intake sound.

[0013]

Next, an embodiment in which the present invention is applied to an air cleaner 1 as shown in FIG. 3 will be described with reference to the drawings.
In the embodiment shown in FIG. 1, the cap 3 of the air cleaner 1
The beads 10 are formed radially around a point offset from the center of the cap 3 so as not to be linearly arranged with respect to the center 3a of the cap 3 therebetween. In the air cleaner having this structure, when a vibration mode is generated as indicated by a solid line G in the diameter direction passing near the center 3a of the cap 3, the bead 10 positioned so as to cross the transmission direction of the vibration mode. , So that transmission cannot be performed as indicated by a broken line H in the diameter direction of the cap 3. The vibration that generates the intake sound in this manner is caused by the cap 3
Can be suppressed. Present invention
The cap 3 of the air cleaner 1 according to
Bead 10 around a more offset point or
Since the ribs 9 are extended radially, the vibration mode is effective.
Will eventually be shut off. In addition, bead 10 or
The rib 9 is offset from the center 3a of the cap 3.
And the angles between them are unequal angles
To form an even number radially or radially
Occurs in the cap 3 by forming an odd number
The vibration mode can be effectively shut off. In the above embodiment, the bead 10 is formed on the cap 3. However, the same effect can be obtained by forming the rib 9 instead of the bead 10. The air cleaner 1 according to the present invention can be applied not only to a synthetic resin, but also to a metal such as steel or other materials.

[0014]

[Effect of the invention] The present invention of the air cleaner houses a filter element in a case of forming the opening, in the air cleaner fitted with a cap for closing the opening, around a point offset from the center of the cap
Then, the ribs or beads are continuously extended radially . In other words, the rib or bead is
It extends continuously radially from a position offset from the center.
Therefore, the planar strength of the cap is
It has changed by the amount set.

Therefore, the vibration mode that is generated in the cap due to the fluctuation of the intake pressure is transmitted in the diametrical direction of the cap from the peripheral portion of the cap toward the center, but the rib or bead is moved from the center. offset
Because it continuously extends radially around the position
In addition, the transmitted vibration mode is interrupted in the vicinity of the central portion, so that it is possible to prevent the cap from generating a vibration that generates an intake sound.

[Brief description of the drawings]

FIG. 1 is a plan view of a cap of an air cleaner according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of an air cleaner in which a cap is fixed to a case by screwing;

FIG. 3 is a sectional view of a main part of an air cleaner in which a cap is fixed to a case by hooking;

4A and 4B are caps formed with ribs used in a conventional air cleaner, where FIG. 4A is a plan view thereof, FIG. 4B is a cross-sectional view taken along line II of FIG. 4A, and FIGS. A- of A)
It is the schematic which shows the state of the vibration which generate | occur | produces in A line.

5A and 5B are caps formed with beads used in a conventional air cleaner, wherein FIG. 5A is a plan view thereof, FIG. 5B is a cross-sectional view taken along line II-II of FIG. It is the schematic which shows the state of the vibration which generate | occur | produces in BB line of a).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Air cleaner 2 Case 2a Opening 3 Cap 3a Central part 5 Filter element 9 Rib 10 Bead

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F02M 35/024 501 F02B 35/024 511 F02M 35/10 F02M 35/16

Claims (3)

(57) [Scope of request for utility model registration] 1. A housing the filter element in a case of forming the opening, in the air cleaner fitted with a cap for closing the opening, the center of the cap
Radial ribs or beads around the offset point
Air cleaner formed by continuously extending the air cleaner. 2. The angle between said ribs or beads being mutually formed.
Claims in which even numbers are formed radially so as to form unequal angles
1. The air cleaner according to 1 . 3. An odd number of said ribs or beads.
The air cleaner according to claim 1, wherein the air cleaner is formed.